Wire-sprietg-making machine



Sept. 4, 1928.

C. H. ZILER WIRE SPRING MAKING MACHINE Filed Feb. 5, 1927 5 Sheets-Sheet 'Sept; 4, 1928.

C. H. ZILER WIRE SPRING MAKING MACHINE Filed Feb. 5, 1927 5 Sheets-Sheet 2 /,V VENTOR Corban H. Ziler 3? Sept. 4, 1928.

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5 Sheets$he et 4 q l/VV/JUVTUR Cor bw ,1 TYOANE ys Sept. 4, 1928.

c. H., ZILER WIRE SPRING MAKING MACHINE Filed Feb. 5, 1927' hy/g g I Z7 Sept. 4, 1928.

C. H. ZILER WIRE SPRING MAKING MACHINE Filed Feb. 5, 1927 A-VVLNTOR Corban H- Ziler 6% I- fl 5 Sheets-Sheet 5 A TTORNE V5 sponding to line 8-8 of Fig. 6 showing de on line 1010 of Fig. 5.v v

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Patented Sept. 4, 1928.

UNITED STATES FATE T FFEQE.

OORBAN I-I. ZILER, F CARTHAGE, MISSOURI, ASSIGNOR TO L. A. YO UNG INDUSTRIES,

- INC, 035 DETROIT, MICHIGAN.

WIRE-SPRING-MAKING MACHINE.

Application filed February 5, 1927. Serial No. 166,158.

The main obj ects of this invention are:

First, to provide an improved spring making machine in which the springs are automatically formed and knotted which is of large capacity.

Second, to provide an improved spring making machinein which the springs are automatically formed, knotted and nested.

Third to provide an improved spring coiling and knotting machine which is very simple and economical in structure and at the same time of large capacity and durable in use. g

Objects pertaining to details and 8001107 mies of my invention will definitely appear from the detailed description to follow. The invention is clearly defined and pointed out in the claims.

A structure embodying the features of my invention is clearly illustrated in the accompanying drawing forming a part of this application, in which Fig. 1 is a side elevation of a spring making machine embodying the features of my invention.

V. Fig. 2 isa fragmentary front perspective view.

Fig. 3 is a detail rear perspective view showing details of parts of the knotter mechanism. V

Fig. 4 is'a fragmentary near elevation of the knotter mechanism in another position from that shown in Fig. 3- v I 5 is a fragmentaryelevation of the parts shown in Figs. 3 and 4 in still another position.

Fig. 6 is an enlarged detail'sect-ion on a line corresponding to line 6 6 of Figs/7, 8 and 9 showing further deta ls of the knotter mechanism. I

Fig. 7 is a detail view partially in section on a line corresponding to line 7 -7 of Fig. 6.

Fig. 8 isa sectional view on a'line corretails of the knotter clamp mechanism,

Fig. 9 is a detail section on a line correspondingto line 9-9 of Fig. 8 showing further details of the knotter clamp mechanism.

' Fig. 10 is a detail view partially in section tails of the wire feed.

Fig-.12 is a fragmentary view partially in section on a line corresponding to line 12-12 Fig. 13 is a detail section showing details of the cutter and end former.

Fig. 14 is a fragmentary view showing details of the spring forming mechanism.

Fig. 15 is a fragmentary plan view of a modified embodiment of my inventionwhich is adapted for the forming of double helically coiled springs and knotting both ends thereof.

Referring to the drawing, 1 represents the main pedestal of the machine supporting the main feed rollers 2 by means of which the wire 3 is fed through the guide rolls 4 against the coiler member 5 which in the embodiment illustrated is a roll.

This coiler roll is movably supported by a swinging-arm 6 mounted on the rockshaft 7. This rockshaft is controlled so that the coiler roll is swung to properly shape the spring. The rockshaft is provided with an arm 8 carrying an adjust-able tappet 9 resting on the lever 10 controlled by the cam 11. These features are of well-known construction and are not illustrated or described with further detail herein. p

In order to properly present the wire I provide a series of straightening rolls 12 which also form no part of this invention.

In order that the end of the stock maybe properly presented to the forming roll for each successive spring, I provide a means for retracting the wire slightly after the formed spring is severed from the stock. This I illustrate in- Figs. 11 and 12 and comprises a clutch carrying arm 14 mounted on therockshaft 15 and held yieldingly in its When the clutch arm 14 is swung to the forward position as shown in Fig. 11 the pivoted jaw 19 engages withthe fixed stop 22, thereby releasing the jaw 19. As soon, however, as the arm 14 swings rearwardly the spring 21 causes the jaw 19 to engage the wire 8, thereby drawing the wire rearwardly through the feed rolls.

The'rockshaft 15 is provided with an arm 23'coacting with a cam 24 on the shaft which also carries the cam. 11. so that the movement of these parts is properly synchronized.

The formed spring is severed by means of the cutter 26 coacting with the shear bar 27. The action of this cutter is properly timed so that the spring is severed as the spring is completely formed and before the retracting means is actuated.

In the embodiment of my invention illustrated in Figs. 1 to 14, the structure is adapted forthe forming of single helically coiled springs, one end only of the spring being knotted and the small end of the spring being slightly offset at 28 to facilitate attachment to thesupport. This I form at the time the springs are cut off, the cutter being provided with a former 29 coacting with the. former 30- on the arm 6. This avoids a second operation in forming the ends of the springs, for mounting on the support such as a wire base or the like. The pitch block 95 is disposed in operative relation to the forming roll. To set the springs as they are formed I provide an arm 96 having a finger 97 projecting therefrom,

the spring coils being forced againstthis arm after leaving the pitch block and being coilplpressed to give them the desired set.

' means for the spring.

y improved knotter mechanism is an ranoed to en a e the sarin s )rior to the severing of the formed spring so that the coils are held in proper relation during the knotting and so that it is not necessary to providea separate supporting or transfer The knotter mechanism is supported on a pair of horizontally disposed ways 31, 32 connected at their outer ends by a spacing block 33, the ways being mounted at their inner ends on the main frame of the machine. member 33 I mount a shaft 34 which is driven bya sprocket wheel 35 and a sprocket chain 36 from the main driving shaft 37. The connections for the sprocket to this shaft 37 are not detailed. The object, it will be understood, is to drive the shaft 34 in synchronism with the spring forming and cutoff mechanism.

The knotter gear 37.. which is of wellknown design, is rotatively mounted in a coiler member 38. This coiler member has rollers 39 engaging the top way 31 and is slidably supported on the carriage 4O. that is, it ismounted thereon for limited sliding movement. The carriage 40 is in turn pro; vided with rollers 41 traveling on the bot tom way 32.

The knotter member 38 has a longitudinal opening therethrough to receive the rack42, this rack c-oacting with the coiler gear so that as the coiler member is reciprocated the gear is rotated to insure the proper positioning of the coiler, permitting the spring to be withdrawn therefrom and also permitting the proper presentation of its slot 43 to re-.

On the spacing,

ceive the coils. The rack 42 has a portion 44 without teeth and with which the teeth of the coiler gear slidably engage as shown in Fig. 7, one tooth 45 of the coiler gear being cut off or shortened as shown in Fig. 7 so that the coiler gear is positively held in the position illustrated while the gear is in sliding engagement with this position of the rack.

On the carriage I mount a pair of coactingspring. gripping jaws 46 and 47, the jaw 46 having a pair of coil rests 48 and 49 adapted to engage the end coil 50 of the spring adjacent the end thereof and also the adjacent coil 51 of the spring. The jaw 47 is adapted to clamp the coils in these seats as shown in Fig. 8. The jaws are preferably formed of spaced engaging members to better adapt them to grip the curved springs.

These jaws are slidably mounted in the carriage 40 for relative movement so that they are opened and closed, the jaws being controlled by the cam 52, see Figs. 6 and 8. The cam is slidable through openings in the jaws. The cam faces 53 and 54 coact on the jaws 46 and 47, respectively. These cam faces are disposed in an opposed relation so that when the cam is actuated the jaws are closed and when retracted the jaws are opened by the coiled spring 55 which is mounted on the bolt 56 projecting from the jaw 46 through an arm 57 on thejaw 47, the spring thus acting to separate or open the jaws. 7

To facilitate adjustment in taking up wear I provide a hardened block 58 coacting with the cam 52, this block being adjustable by means. of the set screw 59. It will be observed that the jaws are positioned below the knotter gear and so that the work is carried into the knotter gear and properly supported during the, knotting operation.

On the forward stroke of the carriage the openjaws receive the spring, the aws being closed at the end of the forward stroke of the carriage. The carriage is riciprocated from the shaft 34 which is provided with a crank arm 60 connected by the pitman 61 to the cam member 62 which is mounted be tween the carriage and the coiler member for lim ted sliding movement relative thereto.

This cam member is, during a portion of the with a cam 65 disengaging the coiler member from the cam member. This. dog also serves as a positive stop for the coiler member, the upper way being provided with a recess stop shoulder 66, see Fig. 10, below the cam and into which the dog is forced by'the cam.

To insure the releasing of the dog on the return stroke I provide a spring pressed plunger 67 with which the dog engages the lln . just prior to the carriage reaching the limit of its forward stroke so that continued movement after disengagement of the coiler member closes the jaws upon the sprin This forward movement also brings the carriage 40 into contact with a stop 68 so that the cam member is moved forwardly relative thereto, permitting the cam locking dog 69, which is pivoted at on the carriage and urged to engaging position by the coiled spring 71, to lock the cam member in jaw.

locking posit-ion. The jaw member is thus locked to the carriage so that these parts traveltogether until the jaw member is re leased at the rear end of the stroke.

The initial movement of the return stroke carries the spring into the knotted gear and bringsthe dog 63 into engagement with the keeper 64 so that the parts all move rearwardly together. In this rearward movement, the knotter gear' traveling on the rack is rotated and the knot formed.

As the parts near the rear end of the stroke the cam locking dog 69 is brought into engagement with the trip 72 thereby releasing the cam and opening the jaws. The knot-ter gear is at this point positioned by the means described so that it is possible to disengage the, spring therefrom.

In the embodiment illustrated I provide a nesting means adapted to remove the springs from the knotting means and nest them together. This mechanism comprises a pair of coacting shifter jaws 7 3 which are pivotally mounted at 74 on the rockshaft 75.

These jaws are held yieldingly together by the coiled spring 7 6 mounted on the bolt 7 7 carried by the inner jaw and disposed through the outer jaw. The rockshaft is provided with a pinion 78 driven from a rack 79. The rear end of this rack is supportedon the shaft 80 of the cam 81, the cam eoacting with the pin 82 on therack.

A spring 83 acts to return'the rack to its retracted position, the cam advancing the rack to actuate the spring clamping jaws. The jaws-are opened when in receiving position by engagement with the cam 84 which opens the jaws in position 'to receive the knotted spring, as it is carried rearwardly. The forward movement of the aws, carrying' them from the cam, allows them to close on the formed spring under the action of the spring 7 6 so that the spring is carried downwardly to the position shown by dotted lines in Fig. 2 into the nesting rack or holder 85. The jaws in this position engage the jaw opening cam 86 so that the jaws are opened.

and the spring deposited.

The nesting rack is provided with a curved guide plate 87 at its forward end, thespring being carried across this plate to be engaged by theside members of the rack at the rear of the plate. The end coil of the spring engaging the rear edge of this plate prevents the spring being retracted with the return movement of the nesting jaws. As successive springs are carried into the nesting rack several springs are pushed along therein as indicated in Fig. 1.

The cam shaft 80 is driven from a sprocket 88 and a sprocket chain 89, the driving connection for this sprocket chain 89 to the driving shaft 37 not being illustrated,

In the modification shown in Fig. 15 I show my improvements adapted for knottingboth ends of a double helicallv coiled spring shown at 90. The mechanisms, so far as the knotting concerned, are duplicates of the knotting mechanism described. The relation of the parts for the outer knot-ter designated generally by the numeral 92 is reversed, that is, changed side for side.

In this embodiment the pitman 61 is connected by the elongated wrist pin 93 to both knotter mechanisms. Equalizing racks 94: are provided to insure simultaneous movement of the two parts and relieve the parts of strain.

Structures embodying my improvements are of very large capacity and are relatively simple and durable in structure. I have not attempted to illustrate or describe various embodiments or adaptations which Icontemplate, as I believe this disclosure will enable those skilled in the art to embody or adapt my improvements as may be desired.

Having thus described my invention what I claim as new and desire to secure by .Letters Patent is:

1. In a wire spring making machine, the combination of a coiling means, means for feeding wire to said coiling means, means for severing formed springs from the stock. spaced top and bottom wa s, a carriage traveling on the bottom way and provided Jith a pair of spring clamping jaws, a knotter member coacting with the top way. said knotter member and carriage being slidably associated for relative movement, a knott r gear rotatably mounted on said knotter member, a fixed rack with which said knotter member 'is slidably associated enacting with said knotter gear, said rack having an untoothed portion at its rear end, said knotter gear having a flattened portion coactin with said untoothed portion of said rack whereby the knotter gear is held agai U rotation, a jaw closing cam member slidably disposedbetween said carriage and knoiter member for limited movement relative to both, said cam member having driving engagement with said carriage,v springs acting to opensaid jaws, a doc pivoted on said knotter member for loop. ig it to said cam 1 member, said dog bei 'disposed to slidabiy .lll)

engage the upper way whereby it is held in engagement with said cam member, said way having a recess in the side thereof permitting the disengagement of said dog, a trip ping cam for said dog disposed opposite said recess in said way, actuating means connected to said cam member whereby it is actuated to close the jaws after the knotter member and the carriage have reached the limit of their forward stroke, a dog on said carriage for locking said cam member to said carriage in its jaw actuating position, and means for releasing said dog on said carriage the knotter member nears the end of its stroke whereby the knotted spring is removed from the knotter gear and the jaws are opened.

2. In a wire spring making machine, the combination of a coiling means, means for feeding wire to said coiling means, means for severing formed springs from the stock, spaced top and bottom ways, a carriage traveling on the bottom way and provided with a pair of spring clamping aws, a knotter member coacting with the top way, said knotter member and carriage being slidably associated for relative movement, a knotter gear rotatably mounted on said knotter member, a fixed rack with which said knotter member is slidably associated coacting with said knotter gear, a jaw closing cam member slidably disposed between said carriage and knotter member for limited movement relative to both, said cam member having driving engagement with said carriage, springs acting to open said jaws, a dog pivoted on said knotter member for looking it to said cam member, said dog being disposed to slidably engage the upper way whereby it is held in engagement with said cam member, said way having a recess in the side thereof permitting the disengagement of said dog, a tripping cam for said dog disposed opposite said recess in said way, actuating means connected to said cam member whereby it is actuated to close the jaws after the knotter men'iber and the carriage have reached the limit of their forward stroke, a dog on said -arriage for locking said cam member to said carriage in its jaw actuating position, and means for releasing said dog on said carriage as the knotter member nears the end of its stroke whereby the knotted spring is removed from the knotter gear and the jaws are opened.

8. In a wire spring making machine, the combination of a coiling means, means for feeding wire to said coiling means, means for severing formed springs from the stock, spaced top and bottom ways, a carriage traveling on the bottom way and provided with a pair of spring clamping jaws, a knotter member coacting with the top way, said knotter member and carriage being slidably associated for relative movement, a knotter gear rotatably mounted on said 1 knotter member, a fixed rack with which said knotter member is slidably associated eoacting with said knotter gear, said rack having an untoothed portion at its rear end, said knotter gear having a flattened portion coacting with said untoothed portion of said rack whereby the knotter gear is held against rotation, a jaw closing cam member slidably disposed between aid carriage and knotter member for limited movement relative to both, said cam member having driving engagement with said, carriage, springs acting to open said jaws, a dog pivoted on said knotter member for locking it to said cam member, a tripping cam for said dog, actuating means connected to said cam member whereby it is actuated to close the aws after the knotter member and the carriage have reached the limit of theirjforward stroke, a dog on said carriage for locking said cam member to said carriage in its jaw actuating position, and meansffor releasing said dog on said carriage as the knotter member nears the end of its stroke.

4. In a wire spring making machine, the combination. of a coiling means, means for feeding wire to said coiling means, means for severing formed springs from the stock, spaced top and bottom ways, a carriage traveling on the bottom way and provided with a pair of spring clamping jaws, a knotter member coacting with the top way, said knotter member and carriage being slidably associated for relative movement, a knotter gear rotatably mounted on said knotter member, a fixed rack with which said knotter member is slidably associated coacting with said knotter gear, a aw closing cam member slidably disposed. between said carriage and knotter member for limited movement relative to both, said cam member having driving engagement with said carriage, springs acting to open said jaws, a dog pivoted on said knotter member for looking it to said cam member, a tripping cam for saiddog,

- actuating means connected to said cam member whereby it is actuated to' close the jaws after the knotter member and the carriage have reached the limit of their forward stroke, a dog on said carriage for locking said cam member to said carriage in its jaw actuating position, and means for releasing said dog on said carriage as the knotter member nears the end of its stroke. I

5. In a wire spring making machine. the combination of a coiling means, a reciprocating carriage provided with spring clampingjaws, a reciprocating knotter memben associated with said carriage for limited rel ative movement, a knotter gear rotatably mountedon said 1 knotter member, a fixed rack coacting with said knotter gear, 'said- -knotter member, a tripping cam for said dog, actuating means connected to said jaw actuating member whereby it is actuated to close the jaws after the knotter member and the carriage have reached the limit of their forward stroke, a dog for locking said jaw actuating member to said carriage, and

means for releasing said carriage dog, for the purpose specified. I

6, In a wire spring making machine, the combination ofa coiling means, a reciprocating carriage provided with spring clamping jaws, a reciprocating knotter member associated with said carriage for limited relative movement, a knotter gear rotatably mounted on said knotter member, a fixed rack coacting with said knotter gear, a jaw actuating member operatively associated with said carriage and knotter member for limited movement relative to both and having driving engagement with said carriage, a dog for locking said jaw actuating member to said knotter member, a tripping cam for said dog, actuating means connected to said jaw actuating member whereby it is actuated to close the jaws after the knotter-member and the carriage havereached the limit of their forward stroke, a dog for locking said jaw actuating member to said carriage, and means for'releasing said carriage dog, for the purpose specified.

7. Ina wire spring making machine, the combination of a coiling means, a reciprocating carriage provided with spring clamping jaws, a reciprocating knotter associated with said carriage for limited relative movement, a jaw actuating member operatively associated with said carriage and knotter for limited movement relative to both and having driving engagement with said carriage, a dog for locking said jaw actuating member to said knotter, a tripping cam for said dog, a dog for locking said jaw actuating member to said carriage, means for releasing said carriage dog at the end of the 7 return stroke of the carriage, and actuating means connected to said jaw actuating mem her.

8. In a wire spring making machine, the combination of coiling means, means for feeding wire to said coiling means, means for severing the formed springs from the stock, a reciprocating knotter, a reciprocating transfer member operatively associated with said knotter for limited independent reciprocating movement, means for actuat ing said transfer member whereby it is actuated to engage the formed spring'prior to the severing of the same from the stock and delivering the same into: operative relation to the knotter, means for actuating the knotter to form the knot during the returnmovement of the knotter, means for limiting the movement of said jaws relative to the knotter on the return stroke thereof so that the knotted spring is released from the knotter, and a second transfer member receiving the knotted spring from said knotter transfer member. i

V 9. In a wire spring making machine, the combination of a coiling means, means for feeding wire to said coiling means, means for severing the formed springs from the stock, a reciprocating knotter, a reciprocating transfer member operative-1y. associated with said knotter for limited independent reciprocating movement, means for actuating said transfer member whereby it is actuated to engage the formed spring'prior to the severing of the same from the stock and delivering the same into operative relation to the knotter, and means for actuatin the knotter to form'the knot during the return movement of the knotter.

10. In a wire spring making machine, the combination of coiling means, a reciprocating knotter, a reciprocating transfer member operatively associated with said knotter for limited independent reciprocating movement, means for actuating said transfer member whereby it is actuated to deliver the same into operative relation to the knotter, means for actuating the knotter to form the knot during the return movement of the knotter, means for limiting the movement of said jaws relativevto the knotter on the return stroke thereof so that the knotted spring is released from the knotter, and a second transfer member receiving the knot- {Jjed spring from said knotter transfer memer. 7 i

11. In a wirespring making machine, the combination of coiling means, a reciprocating knotter, a reciprocating transfer member operatively associated with said knotter for limited independent reciprocating movement, means for actuating said transfer member whereby it is actuated to deliver the same into operative relation to the knotter, means for actuating the'knotter to form the knot during the return movement of the knotter, and means for limiting the movement of said aws relative to the knotter on the return stroke thereof so that the knotted spring is releaesd from the knotter.

12. In a wire spring making machine, the combination of coiling means, a reciprocating knotter, a reciprocating transfer member operatively associated with said knotter for limited independent reciprocating movement, means for actuating said transfer member whereby 'it is actuated to deliver the same into operative relation to the knotter, means for actuating the knotter to form the knot during the return movement of the knotter, and'a second transfer member receiving the knotted spring from said knotter transfer member.

13. In a wire spring making machine, the combination of coiling means, a reciprocating knotter, a reciprocating transfer member operatively associated with said knotter for limited independent reciprocating movement, means for actuating said transfer member whereby it is actuated to deliver the same into operative relation to the knotter, and means for actuating the knotter to form the knot during the return movement of the knotter.

14. In a wire spring making machine, the combination with spring coiling means, of a knotting means comprising a reciprocating knotter member carrying a knotter gear, a rack coacting with said gear as the knotter member is reciprocated, said rack having an untoothed portion at its rear end coacting with said gear to hold it against rotation, jaws mounted to reciprocate with said knotter member and having a limited movement independent thereof whereby the jaws may be advanced to grip the formed spring and operatively associate the spring with the knotter gear while the knotter member is at the forward end of its stroke, and means for releasing said jaws after the knot has been formed in the spring.

15. In a wire spring making machine, the combination with spring coiling means, of a. knotting means comprising a reciprocating knotter member carrying a knotter gear, a rack enacting with said gear as the knotter member is reciprocated, jaws mounted to reciprocate with said knotter member and having a limited movement independent thereof whereby the jaws may be advanced to grip the formed spring and operatively associate the spring with the knotter gear while the knotter member is at the forward end of its stroke, and means for releasing said jaws after the knot has been formed in the sprin 16. In a wire spring making machine, the combination with spring coiling means, of a reciprocating knotter, jaws mounted to reciprocate with said knotter member but having a limited movement independently thereof whereby the jaws may be advanced to grip the formed spring and operatively associate the spring with the knotter gear while the knotter member is at the forward end of its stroke, and means for releasing said jaws after the knot has been formed in. the spring.

' 17. The combination with a coiler mechanism, of means for severing the formed spring from the stock, a reciprocating knotter, means for actuating said knotter during the reciprocating movement thereof, means for transferring the spring from the coiler to the knotter comprising jaws adapted to grip the formed spring prior to its being severed from the stock and to support the same in coacting relation to the knotter, and means for opening said jaws at the end of the return stroke of said knotter.

18. The combination with a coiler mechanism, of a reciprocating knotter, means for actuating said knotter during the reciprocating movement thereof, means for transfcrring the spring from the coiler'to the knotter comprising jaws adapted to grip the formed spring and to support the same in coacting relation to the knotter, and

means for opening said jaws at the end of the return stroke of said knotter.

19. The combination with a coiler mechanism, of a reciprocating knotter, means for actuating said knotter during the reciprocating movement thereof, and means for transferring the spring from the coiler to the knotter.

20. In a wire spring making machine the combination of a spring forming means, a knotter comprising a rotating knotter member, a reciprocating support therefor, means for rotating said member during such reciprocating movement, and means for transferring the spring from the coiler into operative relation to said rotating knotting member.

21. vIn a wire spring making machine, a coiler, a reciprocating knotter, and means for engaging the bottom and an adjacent coil of the spring while in'the coiler and prior to its being severed from the stock and for positioning the spring in operative relation 7 to said knotting means.

22. In a wire spring making machine, a coiler, a reciprocating knotter, and means for engaging the spring and for positioning the same in operative relation to said knotting means.

23. In a wire spring making machine, a

coiler, a reciprocating knotter, means for reciprocating the knotter to and from the coiler to receive the springs, and means for actuating the coiler to knot the spring durter.

24:. In a wire spring making machine, a coiler, reciprocating knotting means, and means for transferring a spring from said coiler to said knotting means and supporting the spring in operative relation to said knotting means during the reciprocation thereof.

25. The combination with a coiler, a knot-v ter mounted for reciprocating movement operatively associated with said coiler to receive the springs therefrom, said knotter being actuated during its reciprocating movement to form the knot.

26. The combination with a coiler, a moving the reciprocating movement of the knotably mounted knotter operatively associated with said coiler to receive .the springs therefrom, and means for actuating said knotter to knot the spring while the'knotteris in motion. 7

27. The combination with a coiler, of a movably mounted knotter opera-tively associated with said coiler and provided with means whereby the knot is formed during the movement of the knotter.

28.- The combination with a coiler mechanism, of a reciprocating knotter, means for transferring the spring from the coiler to the knotter, means for releasing the spring at the end of the return stroke of the knotter, a nester comprising a nesting rack, a rockshaft provided with a pinion, a pair of opposed jaws pivotally. mounted on said rockshaft to swing into said rack, a spring for urging said jaws yieldinglytogether, said jaws bein positioned so that the knotted spring is carried between them at the end of the work stroke of the knotter, means for opening said jaws when in receiving and in delivery position, a rack coacting with said pinion, and means for reciprocating said rack timed with the movement of said knotter.

29. The combination with a coiler, of a reciprocating knotter operatively associated therewith and. provided with means for forming the knot during the retracting movement of the knotter, a nester comprising a nesting rack provided with an outwardly curved guide plate at its front end,

a rockshaft provided with a pinion, a pair of opposed forwardly diverging jaws pivotally mounted on said rockshaft, a spring for urging said jaws yieldingly together, said jaws being positioned so that the knotted spring is carried between them at the end of the work stroke of the knotter, cams positioned to open said jaws when they are in receiving and in delivery position, a rack coacting with said pinion, and means for reciprocating said rack timed with the movement of said knotter.

80. The combination with a coiler, of a reciprocating knotter operatively associated therewith and provided with means for forming the knot during the retracting movement of the knotter, a nester comprising a nesting rack, a rockshaft, a pair of opposed forwardly diverging jaws pivotally mounted on said rockshaft, a spring for urging said jaws yieldingly together, said jaws being positioned so that the knotted spring is carried between them at the end of the work stroke of the knotter, cams positioned to open said jaws when they are in receiving and in delivery posit-ion, and means for actuating said rockshaft timed with the movement of said knotter.

31. The combination with a coiler, of a movable knotter operatively associated with said coiler, a nester comprising a nesting rack, a rockshaft, a. pair of opposed for wardly diverging aws pivotally mounted on said rockshaft, a spring for urging said jaws yieldingly together, said jaws being positioned so that the knotted spring is delivered between them by said knotter, cams positioned to open said jaws when they air in receiving and in delivery position, and means for actuating said rock shaft timed with the knotter.

82. The combination with a coiler, of a movably mounted knotter operatively associated with said coiler and provided with means whereby the knot is formed during the movement of the knotter, a nester com prising a neztin g rack. spring engaging jaws oscil. tingly mounted to swing into said rack, and means for opening said jaws when in receiving and discharging position.

33. The combination with a coiling means, a reciprocating knotter operat-ively associated with said coiler to receive the springs therefrom and acting to-knot the s iirings on the reciprocation of the knotter, a nesting means comprising a transfer memher to which the knotted springs are delivered by said knotter, a nesting rack to which said springs are delivered by said transfer member, and synchronized operating means for said coiler, knot-ter and transfer member.

34. The combination with a coiler, a knotter mounted for reciprocating movement operatively associated with said coiler to receive the springs therefrom, said knotter being actuated during its reciprocating movement to form the knot, and a transfer member to which the knotted spring is delivered by said knotter, said coiler, knott-er and transfer member being provided with synchronized driving means whereby their actuation is timed.

35. The combination with a coiler, a movably mounted knotter operatively associated with said coiler to receive the springs therefrom, means for actuating said knotter to knot the spring while the ,knotter is in mo tion, and a transfer member to which the knotted spring is delivered by said knotter.

36. In a spring forming machine, the co1nbination with feed rollers, a coiling member against which the wire is fed by said rollers, means for severing the formed springs comprising a reciprocating cutter, a shear block, coacting forming members on said shear block and cutter for conforming the end of the stock as said cutter'is actuated, means for retracting the stock after the formed spring has been severed comprising a pivoted arm provided with a relatively fixed clutch jaw over which the stock passes to said feed rollers, a coacting spring pressed pivoted jaw carried by said arm, means for oscillating said arm timed wit-h Inn said cutter, and a tappet adapted to disengage the pivoted clutch jaw when said clutch arm is in its normal position.

37. In a spring forming machine, the combination with feed rollers, a coiling member against which the wire is fed by said rollers, means for severing the formed springs comprising a reciprocating cutter, a shear block, coacting forming members on said shear block and cutter for conforming the end of the stock as said cutter is actuated, and means for retracting the stock after the formed spring has been severed.

38. In a spring forming machine, the combination with wire feed means, a coiling member against which the wire is fed, means for retracting the stock after the formed spring has been severed comprisin a pivoted arm provided with a relatively hxed clutch jaw over which the stock passes to said feed rollers, a coacting spring pressed pivoted jaw carried by said arm, means for oscillating said arm timed with the severing means, and a ta-ppet adapted to disengage the pivoted clutch jaw when said clutch arm is in its normal position.

39. In a spring forming machine, the combination with wire feed means, a coiling member against which the ire is fed, and means for retracting the stock after the formed spring has been severed.

&0. The combination in a spring forming means comprising a wire feed means, a forming member, and a pitch member, of an arm disposed in spaced opposed relation to said pitch member and against which the coils of the springs are successively thrust as they are formed whereby the coils are partially compressed, sad arm being provided with a coil engaging finger.

41. The combination in a. spring forming means comprising a wire feed means, a forming member, and a pitch member, of an arm disposed in s aced relation to said pitch member and with which the coils of the springs successively engage at points substantially removed from the pitch memher as they are formed whereby the coils are partially compressed.

42. The combination with a coiled spring forming means of an arm-like member 0peratively associated with said spring forming means so that the coils of the springs are successively forced against the member the point of engagement of the springs with said member being substantially removed from the coil forming means 'so that the coils may be placed under compression by said member. y

In witness whereof I have hereunto set my hand.

CORBAN H. ZILER. 

